Custom Application for DNN Portal - Bulk Upload of Files to Individual User Accounts

I need help finishing a 'User Statements' portal built on DotNetNuke. The portal will have several thousand user accounts and each month, all users will access the portal to review their monthly billing statements in PDF format. We need an app that can do the following: (1) read a .CSV (or Excel, if that is easier) file that contains columns for User ID/Account #, month and year of statement, and filename. (2) Looking in a directory on the website (where the files will already be uploaded), the software needs to find the files listed in the .CSV and add them to each user ID/Account # in the system. Each file must be attached to the individual user and the correct month/year. (3) Make these files available for the appropriate user in several places in the DNN portal. Screenshots and additional details can be provided on request. Upon selecting a developer, we will make the application available on a remote test server. Upon successfully testing the application, we will ask for the developer's help to implement it on the production server. Time is of the essence on this project and there will be more work on the same portal in the future. Please do not hesitate to send questions or ask for clarification.